High interrupts w/ Cisco 350 card
PeterJeremy at optushome.com.au
Wed Sep 21 01:01:35 PDT 2005
On Tue, 2005-Sep-20 19:44:07 -0400, Peter D. Quilty wrote:
>I'm running 5.4-RELEASE-p6 on a Toshiba Tecra M2 laptop. My network
>card is a Cisco 350 PCMCIA card. I'm experiencing a very high rate of
>interrupts during heavy network traffic.
Not quite. "vmstat -i" reports 173 interrupts/sec. That's not high.
"systat -iostat" shows a ludicrously high interrupt load though.
I notice that almost all the hardware on your laptop maps to irq 11 -
that's undesirable. Can you convince your BIOS to use different
> This Cisco card works fine in every other laptop I have.
> I suspect it might be a cardbus problem, but I don't
>know how to resolve it or troubleshoot it any further.
The PCCard bus is fairly atrocious (basically ISA) but isn't that bad.
I can get roughly wire speed from a 10baseT NIC without serious CPU
strain on a P-233 laptop.
Have you tried anything other that FreeBSD 5.4 on your Tecra?
>interrupt total rate
>irq11: cbb0 cbb1+++ 6773905 173
> /0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100
>cbb0: <ToPIC100 PCI-CardBus Bridge> at device 11.0 on pci2
>cardbus0: <CardBus bus> on cbb0
>pccard0: <16-bit PCCard bus> on cbb0
>cbb1: <ToPIC100 PCI-CardBus Bridge> at device 11.1 on pci2
>cardbus1: <CardBus bus> on cbb1
>pccard1: <16-bit PCCard bus> on cbb1
>an0: <Cisco Systems 350 Series Wireless LAN Adapter> at port 0xc000-0xc03f irq 11 function 0 config 5 on pccard0
>an0: got RSSI <-> dBM map
>an0: supported rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
>an0: Ethernet address: 00:07:0e:b9:2e:d5
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